Dental abrasive or grinding disk



G. 0. BURLEW.

DENTAL ABRASIVE 0R GRINDING DISK.

APPLICATION man ocT. 3o. |911.

1,314,125. l Patented Aug. 26,1919.

A TTOH/VEY Tun COLUMBIA PLANonu/ulu C0.. WASHINUTON. n. c.

GILDEROY O. BURLEW, OFNEWARK, N EW JERSEY.

DENTAL ABRASIVE 0R GRIN DING DISK.

Specification of Letters Patent. Patented Aug. 26, 1919.

Application filed October 30, `1917. Serial No.` 199,224.

'0 all t0/2,0m t may com/cfm Be it known that I, GILDnnoY O. BUnLnw, a citizen of the United States, residing in fthe city `of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Dental Abrasive or Grinding Disks, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to `which it pertains to make and use the same, reference being had to the accompanying drawings, and to numerals of reference marked thereon, forming a part 0f this specification.

It is customary in dental work to employ -iwheels or disks fixed upon a' revolving mandrel for the purpose of grinding, cutting, and polishing teeth. These grinding wheels or disks are mounted upon a steel mandrel and when so mounted the grinding wheel or diskV becomes a rigid and unyielding body `which causes great discomfort and pain in preparing abutments for crowns and bridge Work.

Furthermore, the periphery of the grinding vwheels or disks so mounted have a tendency to become irregular thereby causing great shock and impairing the efficiency of the work.

A grinding disk or wheel so mounted will run at an exact right angle to the revolving mandrel upon which it is fixed.

The object of my invention consists in providing the central opening or aperture of a grinding disk with recesses, and secur-` ing into saidrecesses a soft yieldable center core, said center core being provided with a central hub having vprojections formed upon its central hub to engage with the said recesses for securing said center core to said disk.

A Still further object of my invention is #to provide grinding wheels or disks which shall be positive yet effective in operation, simple and inexpensive in construction, and durable in use.

These objects I perform in the preferred embodiment of my invention, which I have illustrated in the accompanying drawings, to which reference is had, and in which similar reference characters indicate corresponding parts in the several views.

In the drawings,

Figure l represents a plan view of my improved device.

Fig. 2 represents a sectional view taken on line m-w of Fig. 3. .Y

Fig. 3 represents a plan view of my i1nproved device representing the centercore in section.

Figs. 4 and 5 represent respectively a plan View and a side elevation of the center core removed from the disk.

Fig. 6 represents a -plan view of a modified form of my improved device; and

Fig. 7 represents a mandrel and applied disk.

In the drawings, 1 represents a disk suitable for abrading, cutting, polishing, etc., according to the work to be done. The disk 1 is provided with a central opening 2 for the rece tion of the yieldable center core 3. This yidldable center core is provided with an opening 4 by means of which it is secured upon the mandrel. The center core 3 as illustrated in the drawings is provided with a central hub 5 on each side of which are integrally formed Ipreferably thin rubber flanges 6 6 designed to engage with the opposite faces lof the disk l adjacent to the opening 2 therein and by means of which the center core is buttoned or secured to the disk.

From an inspection of Figs. 2 and 3 of the drawings it will be noted that the diameter of the hub 5 is slightly less than the diameter of the opening 2 in the disk and that the same is provided with a plurality of projections 7 the distance across said projections being slightly greater than the diameter of the opening 2 in order that the projections` may engage with the bore or opening 2 of the disk.

The center core 3 is secured or buttoned to the disk by forcing the same through the opening 2 thereof.

It will thus be seen that I have provided a disk or wheel of the character described which will hold its angular position upon the mandrel with perfect firmness and security and at the same time will readily permit the changing of its angular position upon the mandrel.

In the modified form illustrated in Fig. 6 I have shown the central hub 5 provided with a series of projections 7 designed to be received into a corresponding series of recesses 8 formed in the bore or opening 2 of the disk l to provide additional holding means for more irmly securing if desired dental turning of the disk.

In Fig. 7 of the drawings the dotted lines,

represent the positions that" my vimproved device lWill assume if itbe desired toH haveV Y y opening having recesses formed therein and Y arsoft yieldable center core provided with a the disk operate at an angle different from a rightjangle to the mandreh Y f y Experience has demonstrated that Ythe device above described is ahighl-y eiicient one, and While the device shown is the preferred embodiment of 'my inventionf'do 'not care to restrict myself to the exact details of con# struction described, 'it being-obvious that minor variations thereof not involving the exercise of invention, may be made by lany skilled mechanic, and suchV departures from ,scope and terms of my claim.

I claim:

Agrinding disk` provided With a central central hub having lprojections formed upon its central hub to engage with said recesses for securing said center coreto said disk.

This specification signed and `witnessed this 27 th day of October, 1917.

GILDEROY'O. BURLEW.

Witnesses: y Y

' FREDK C. FISCHER,

EDWARD HAZLER.

Copies of this patent may 'be obtained 'forfve'ceiits each, by addressing thecommissioner ofV at'ents.

Y Washington, D. G. v 

